html,
body {
  margin: 0px;
  height: 100%;
  width: 100%;
}

#map0 {
  width: calc(50% - 2px);
  height: calc(100% - 2px);
  float: left;
  border : 1px solid;
}

#map1 {
  width: calc(50% - 2px);
  height: calc(100% - 2px);
  float: right;
  border : 1px solid;
}

.attr {
  background-color: #34495e;
  color : #fff;
  padding:0px 4px;
  font : 16px sans-serif;
}
